feat(P7): IHF Phase 7 complete — advanced observability and operational integration

T01 schema: friction_scores, bottleneck_records, hub_health_snapshots,
cross_hub_propagations + migration 1743552000.

T02 Widget Pain Heatmap: computeFrictionScore (formula documented), RecomputeFriction
action, colour-coded grid view (green/yellow/amber/red).

T03 Workflow Bottleneck Analysis: detectBottlenecks across 4 pipeline stages
(candidate 30d, requirement 60d, decision 30d, observation 14d), idempotent,
severity from age ratio, resolve action.

T04 Hub Health Correlation: computeHubHealth (deduction table documented),
append-only HubHealthSnapshot, health history view, badge on hub Show page.

T05 Cross-Hub Propagation: annotation_cluster + widget_type_friction heuristics,
idempotent detection, acknowledge/resolve lifecycle.

T06 Operational Review Board: 4-panel AutoRefresh global dashboard — health matrix,
top-10 friction, bottleneck stage counts, open propagations.

T07 gate: 5 describe blocks in Test/Integration.hs; SCOPE.md updated Phase 7
complete; docs/phase7-summary.md written.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Web/View/CrossHubPropagations/Index.hs

@@ -0,0 +1,88 @@
+module Web.View.CrossHubPropagations.Index where
+
+import Web.Types
+import Generated.Types
+import IHP.Prelude
+import IHP.ViewPrelude
+
+data IndexView = IndexView
+    { propagations :: ![CrossHubPropagation]
+    , hubs         :: ![Hub]
+    }
+
+instance View IndexView where
+    html IndexView { .. } = [hsx|
+        <div class="flex items-center justify-between mb-6">
+            <h1 class="text-2xl font-semibold">Cross-Hub Propagations</h1>
+            <a href={DetectPropagationsAction}
+               class="text-sm bg-indigo-600 text-white px-3 py-1.5 rounded hover:bg-indigo-700">
+                Detect
+            </a>
+        </div>
+
+        {if null propagations
+            then [hsx|<p class="text-sm text-gray-400">No propagation events detected yet.</p>|]
+            else [hsx|
+                <div class="bg-white rounded-lg border border-gray-200 overflow-hidden">
+                    <table class="w-full text-sm">
+                        <thead class="bg-gray-50 border-b border-gray-200">
+                            <tr>
+                                <th class="text-left px-4 py-3 font-medium text-gray-700">Pattern</th>
+                                <th class="text-left px-4 py-3 font-medium text-gray-700">Summary</th>
+                                <th class="text-left px-4 py-3 font-medium text-gray-700">Source Hub</th>
+                                <th class="text-left px-4 py-3 font-medium text-gray-700">Status</th>
+                                <th class="text-left px-4 py-3 font-medium text-gray-700">Detected</th>
+                                <th class="px-4 py-3"></th>
+                            </tr>
+                        </thead>
+                        <tbody class="divide-y divide-gray-100">
+                            {forEach propagations renderRow}
+                        </tbody>
+                    </table>
+                </div>
+            |]}
+    |]
+      where
+        hubName hid = maybe "–" (.name) (find (\h -> h.id == hid) hubs)
+
+        renderRow :: CrossHubPropagation -> Html
+        renderRow p = [hsx|
+            <tr class="hover:bg-gray-50">
+                <td class="px-4 py-3">
+                    <span class="bg-purple-100 text-purple-700 text-xs px-1.5 py-0.5 rounded">
+                        {p.patternType}
+                    </span>
+                </td>
+                <td class="px-4 py-3 text-gray-700">{p.summary}</td>
+                <td class="px-4 py-3 text-gray-500 text-xs">
+                    {maybe "–" hubName p.sourceHubId}
+                </td>
+                <td class="px-4 py-3">
+                    <span class={statusBadge p.status <> " text-xs px-2 py-0.5 rounded font-medium"}>
+                        {p.status}
+                    </span>
+                </td>
+                <td class="px-4 py-3 text-xs text-gray-400">{show p.detectedAt}</td>
+                <td class="px-4 py-3 text-right">
+                    {if p.status == "open"
+                        then [hsx|
+                            <a href={AcknowledgePropagationAction { crossHubPropagationId = p.id }}
+                               class="text-xs text-yellow-600 hover:underline mr-2">Acknowledge</a>
+                        |]
+                        else mempty}
+                    {if p.status /= "resolved"
+                        then [hsx|
+                            <a href={ResolvePropagationAction { crossHubPropagationId = p.id }}
+                               class="text-xs text-green-600 hover:underline">Resolve</a>
+                        |]
+                        else mempty}
+                </td>
+            </tr>
+            |]
+
+statusBadge :: Text -> Text
+statusBadge s = case s of
+    "open"         -> "bg-yellow-100 text-yellow-800"
+    "acknowledged" -> "bg-blue-100 text-blue-800"
+    "resolved"     -> "bg-green-100 text-green-800"
+    _              -> "bg-gray-100 text-gray-600"